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Mirrors > Home > ILE Home > Th. List > jca | GIF version |
Description: Deduce conjunction of the consequents of two implications ("join consequents with 'and'"). (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 25-Oct-2012.) |
Ref | Expression |
---|---|
jca.1 | ⊢ (𝜑 → 𝜓) |
jca.2 | ⊢ (𝜑 → 𝜒) |
Ref | Expression |
---|---|
jca | ⊢ (𝜑 → (𝜓 ∧ 𝜒)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | jca.1 | . 2 ⊢ (𝜑 → 𝜓) | |
2 | jca.2 | . 2 ⊢ (𝜑 → 𝜒) | |
3 | pm3.2 138 | . 2 ⊢ (𝜓 → (𝜒 → (𝜓 ∧ 𝜒))) | |
4 | 1, 2, 3 | sylc 62 | 1 ⊢ (𝜑 → (𝜓 ∧ 𝜒)) |
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